Scanning Electrochemical Microscope Studies of Charge Transfer Kinetics at the Interface of the Perovskite/Hole Transport Layer

Table 1

Normalized rate constant k_eff (cms⁻¹) for NiO/CH3NH3PbI3 and PODT: PSS/CH₃NH₃PbI₃ in blue illumination.

/10^−9 (mol cm^−2s^−1)	Curve #		k eff/10^−3 (cms^−1)	k eff//10^6 (mol/cm^2)
(a) NiO/CH3NH3PbI3
22.4	7	0.0156	16.9	0.75
19.8	6	0.0152	16.5	0.83
13.9	5	0.0139	15.1	1.08
11.8	4	0.0132	14.3	1.21
6.82	3	0.0107	11.6	1.71
4.12	2	0.0101	11.1	2.69
2.02	1	0.0055	5.94	2.94
(b) PODT : PSS/CH3NH3PbI3
22.4	7	0.0124	13.4	0.59
19.8	6	0.0119	12.9	0.65
13.9	5	0.0108	11.6	0.83
11.8	4	0.0101	10.7	0.91
6.82	3	0.0078	8.44	1.24
4.12	2	0.0071	7.96	1.93
2.02	1	0.0036	3.97	1.97
(c) FTO/CH3NH3PbI3
22.4	7	0.0233	4.12	0.183
19.8	6	0.0225	3.99	0.201
13.9	5	0.0203	3.59	0.258
11.8	4	0.0192	3.39	0.287
6.82	3	0.0151	2.66	0.391
4.12	2	0.0142	2.51	0.609
2.02	1	0.0723	1.28	0.634